I grew up watching stuff like star trek, hope is an intrinsic part of what I believe in and the sheer lack of hope shown here disgusts me. You're free to believe what you want but if these truths presented here are yours in earnest then I find that the critical behavior on either side is fundamentally flawed.
But, Star Trek still has conflict. It still has fighting and wars, and bad things do happen. Yes, the Federation is generally a good place to be, but it is sure as hell not
perfect.
Ironically, one of Star Trek episodes clearly shown that without inner evil humans are not humans. When Kirk was robbed of his evil self in a freak accident he was pure good but inept and incapable to act under pressure.
You probably think Star Trek is all rainbows and sunshine which is a very superficial belief.
Star Trek is generally a very Utopian vision of the world. It's a post-scarcity society with little crime and technology that means that people can live far better lives (in general) than we have now. It is probably close to the best that humans are ever likely to achieve (I don't think there's anything in there that is fundamentally impossible).
But, even so, it is not a perfect society, and it is sure as hell not an entirely peaceful one. The Enterprise has weapons for a
reason.